How much CO2 does recycling scrap steel actually save compared to producing new steel from virgin ore?
Short answer: Recycling steel scrap through an electric arc furnace generally uses meaningfully less energy, and produces significantly lower CO2 emissions per tonne, than producing steel from virgin iron ore through a traditional blast furnace process — the exact savings figure varies by study and process route, but the general direction is well established: melting existing steel already in metallic form requires far less energy than extracting and reducing iron ore from scratch.
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Virgin steel production starts with iron ore, which has to be mined, crushed, and chemically reduced from iron oxide into metallic iron — an energy-intensive process before any steel is even made. Scrap steel is already metallic, so recycling it through an electric arc furnace skips that entire reduction step, which is where most of the energy and emissions in virgin production come from.
Why the exact percentage varies by source
Different studies use different system boundaries — some count only the furnace process, others include mining, transport, and ore processing for the virgin comparison — which is why you’ll see a range of quoted savings figures rather than one universal number. The consistent finding across studies, though, is that recycled steel has a substantially lower carbon footprint than virgin steel.
What this means practically for sellers
You don’t need the exact figure to know that scrap steel you’re selling is displacing a more carbon-intensive virgin production process somewhere down the line — that’s a genuine, defensible claim to make, even without citing a single precise percentage.
How ScrapTrade Makes This Easier
Buyers on ScrapTrade who can point to their downstream mill’s use of recycled content are effectively part of that lower-carbon supply chain — worth asking about when comparing offers if this matters to you.
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